well, here are my questions:

1. is it ok if i connect to database (Statement st = cn.createStatement()) and
then after I fetch the resultset, I don't close it (st.close()) ? will it slow down
the connection to the database? because in my program, there is some
create statement lines, and I never use st.close.

2. if I use many ArrayLists, will they slow my program? because I think
ArrayList is better than the normal [] array.

thank you,